<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			/*
			行高为32px，.a的实际高度却是35.2px
			*/
			.a{
				line-height: 32px;
			}
			.a span{
				font-size: 24px;
				/* font-family: "microsoft yahei"; */
				
			}
		</style>
	</head>
	<body>
		<div class="a">
			<span>文本</span>
		</div>
	</body>
</html>
